Modern systems such as fly-by-wire aircraft, nuclear power plants, manufacturing facilities, battlefields, etc., are all examples of highly connected network enabled systems. Many of these systems are also mission critical and need to be monitored round the clock. Such systems typically consist of embedded sensors in networked subsystems that can transmit data to central (or remote) monitoring stations. Moreover, many legacy are safety systems were originally not designed for real-time onboard... Topics: CERTIFICATION, FUEL PUMPS, TURBINE PUMPS, SYSTEMS ENGINEERING
byInstitution of Mechanical Engineers (Great Britain)
Book digitized by Google from the library of New York Public Library and uploaded to the Internet Archive by user tpb. ( 1 reviews ) Topics: Mechanical engineering, Automatic control, Systems engineering Source: http://books.google.com/books?id=z2EAAAAAMAAJ&oe=UTF-8
byFasanella, Edwin L.; Jackson, Karen E.; Lyle, Karen H.; Spellman, Regina L
A study was performed to examine the influence of varying mesh density on an LS-DYNA simulation of a rectangular-shaped foam projectile impacting the space shuttle leading edge Panel 6. The shuttle leading-edge panels are fabricated of reinforced carbon-carbon (RCC) material. During the study, nine cases were executed with all possible combinations of coarse, baseline, and fine meshes of the foam and panel. For each simulation, the same material properties and impact conditions were specified... Topics: SYSTEMS ENGINEERING, SAFETY FACTORS, ACCIDENTS, MATHEMATICAL MODELS
We introduce a statistical data model and an associated optimization-based clustering algorithm which allows data vectors to belong to zero, one or several ''parent'' clusters. For each data vector the algorithm makes a discrete decision among these alternatives. Thus, a recursive version of this algorithm would place data clusters in a Directed Acyclic Graph rather than a tree. We test the algorithm with synthetic data generated according to the statistical data model. We also illustrate the... Topics: SYSTEMS ENGINEERING, FEASIBILITY, PROCEDURES, EXHAUSTING, ALGORITHMS, MODELS
An experimental apparatus was designed and used to measure the bidirectional reflectance of zinc oxide in the spectrum 0.25 to 2.5 microns. The nonspecular reflectance is essentially Lambert for wavelengths above 0.40 microns with the most deviation occuring for large source zenith angles. Below 0.400 microns the nonspecular reflectance is greater than Lambert in all directions and is greatest in the forward and backscatter directions. The ratio of the specular component to the nonspecular... Topics: CONFERENCES, SYSTEMS ENGINEERING, CONTROL BOARDS, TAPE RECORDERS
The vast majority of satellites and near-earth probes developed to date have relied upon photovoltaic power generation. If future missions to probe environments close to the sun will be able to use photovoltaic power, solar cells that can function at high temperatures, under high light intensity, and high radiation conditions must be developed. For example, the equilibrium temperature of a Mercury surface station will be about 450 C, and the temperature of solar arrays on the proposed ''Solar... Topics: RADIATION BELTS, TRAPPED PARTICLES, SYSTEMS ENGINEERING, SPACECRAFT MODELS, STANDARDS
byCarati, Daniele; Rogers, Michael M.; Wray, Alan A
A statistical ensemble of large eddy simulations (LES) is run simultaneously for the same flow. The information provided by the different large scale velocity fields is used to propose an ensemble averaged version of the dynamic model. This produces local model parameters that only depend on the statistical properties of the flow. An important property of the ensemble averaged dynamic procedure is that it does not require any spatial averaging and can thus be used in fully inhomogeneous flows.... Topics: PROJECT MANAGEMENT, LEARNING, TEAMS, HUMAN PERFORMANCE, SYSTEMS ENGINEERING
The results of the booster verification wind tunnel test are presented. These tests were conducted in a 14 x 14-inch trisonic wind tunnel utilizing a .0035 scale model. The nominal Mach numbers tested were 0.6, 0.9, 0.95, 1.0, 1.05, 1.20, 1.50, 2.0, 2.74, 3.00, 4.50 and 5.0. The angle of attack range was 5 to 40 deg. The yaw data was obtained over a range of -10 to 10 deg at fixed angles of attack of 0, 6, 15, 25, and 30 deg. The Reynolds number range was 4.2 to 6.9 million per foot. Results... Topics: LASERS, SPECTROSCOPIC ANALYSIS, SYSTEMS ENGINEERING, EMISSION SPECTRA, METALLURGY, RAMAN...
In this report, advanced scatterometer concept options to operate in the post-SeaWinds era are examined. In order to meet the future requirements of scientific and operational users, a variety of scatterometer systems capable of producing improved wind vector products are evaluated. Special emphasis is placed on addressing concept options that operate at higher altitudes in order to improve the temporal revisit time. A preliminary set of generalized wind measurement goals designed to meet the... Topics: SYSTEMS ENGINEERING, MICROELECTRONICS, MANAGEMENT SYSTEMS, COMPUTER TECHNIQUES, SECURITY,...
A wind tunnel investigation was made of the aerodynamic characteristics of a 14.5 foot semispan, externally-blown jet flap model. The model was equipped with a single 30-inch diameter, ducted fan with a 1.03 pressure ratio. The effects of flap size, fan vertical location, and wing sweep on the longitudinal aerodynamic characteristics were studied. Topics: ELECTRIC GENERATORS, HEAT EXCHANGERS, SNAP 8, COMPUTER PROGRAMS, SYSTEMS ENGINEERING